画面构图有利于作品主题与（）的表现。
A.光影
B.形式
C.美感
D.层次
参考答案：C
He does help others, but he always expects returns ____. As a result, nobody will accept anything from him.
A．at no time
B．in no time
C．for no time
D．after no time
地下水取水构筑物的位置应符合哪些要求？
